Meaning of biàn tài:
变态
to metamorphose (biology)
Húdié zài máomao chóng jiēduàn hòu huì fāshēng biàntài.
蝴蝶在毛毛虫阶段后会发生变态。
Butterflies undergo metamorphosis after the caterpillar stage.
abnormal; perverted
Zhè zhǒng xíngwéi fēicháng biàntài.
这种行为非常变态。
This behavior is very abnormal.
Tā zǒng shì zuò yīxiē hěn biàntài de shìqíng.
他总是做一些很变态的事情。
He always does some very perverted things.
hentai; (slang) pervert
Zhè bù mànhuà hěn biàntài, bù shìhé xiǎoháizi.
这部漫画很变态,不适合小孩子。
This comic is very hentai, not suitable for children.
Tā shì gè biàntài, zǒng shì zuò qíguài de shìqíng.
他是个变态,总是做奇怪的事情。
He is a pervert and always does weird things.